查询词典 null hypothesis

Regular expression pattern strings may not contain null bytes, but can specify the null byte using the \number notation. Both patterns and strings to be searched can be Unicode strings as well as 8-bit strings. The re module is always available.

正则表达式的pattern字符串可能没包含null 字节，但是能够使用\njumber记号指定null 字节。pattern和被搜索的字符串都能够既是Unicode字符串也是8位字符串。re模块总是存在的。

Null rence on Traffic and Transportation US A American Society of Civil Engineering , 2000,null

李文捷 非均衡多市场的调控机制研究数量经济技术经济研究， 1994，4

The most reliable way to create null-modem connection is using of virtual serial ports emulated by virtual serial port driver and null-modem cable.

创建非调制解调器电缆连接的最可靠方式是通过虚拟串口设备和非调制解调器电缆模拟使用虚拟串口。

John Barrett Environment Report 2001/2 STOA programme http.//www.reprogress.com , null,null

杨开忠%杨咏%陈洁生态足迹分析理论与方法地球科学进展， 2000，6

Suretyship contract would be null and void not only because of being null and void of the principal contract but also because of its own.

保证合同既可能因主合同无效而无效，亦可因自身的原因而无效。

Consoli A%Musumeci S%Oriti G Active voltage balancement of series connected IGBTs null , 1995,null

陈志英%阮新波零电压开关PWM复合式全桥三电平变换器 10.3321/j.issn：0258-8013.2004.05.005 中国电机工程学报， 2004，05

Thirdly, the maximum-likelihood CFO estimation algorithms based on null-subcarrier are investigated, and it is shown that the maximum-likelihood CFO estimation algorithm based on equispaced null-subcarriers is equivalent to the CFO estimation algorithm utilizing the correlation of repeated training sequences.

进一步分析了在频率选择性衰落信道下，空载波和信道零点的数目与位置对基于空子载波的载波频偏估计算法可辨识性的影响。

Thirdly, the maximum-likelihood CFO estimation algorithms based on null-subcarrier are investigated, and it is shown that the maximum-likelihood CFO estimation algorithm based on equispaced null-subcarriers is equivalent to the CFO estimation algorithm utilizing the correlation of repeated training sequences.

提出了两种基于时域相关峰值检测的同步估计改进算法：1）采用一个OFDM符号做为训练序列，在接收端进行差分相关以解决时间度量函数中出现的平台效应。

JITENDRA KIKANL%OSWALDO A%PEDROSA JR Perturbation analysis of stress-sensitive reservoirs.[SPE 20053] null , 1991,null

廖新维%王小强%高旺来塔里木深层气藏渗透率应力敏感性研究 10.3321/j.issn：1000-0976.2004.06.028 天然气工业， 2004，06

WANG Shang-yi Calculation of longshore sediment transport rate null , 1995,null

窦国仁 潮汐水流中的悬沙运动及冲淤计算水利学报， 1963，4

They have quite a lot of work to do.

他们有许多工作要做。

Let us give you a more elaborate example of this process.

让我们给你这个过程的更多的详细例子。